OutputAudioConfig

Instructs the speech synthesizer how to generate the output audio content.

JSON representation 
{
  "audioEncoding": enum (OutputAudioEncoding),
  "sampleRateHertz": integer,
  "synthesizeSpeechConfig": {
    object (SynthesizeSpeechConfig)
  }
}
Fields
audioEncoding

enum (OutputAudioEncoding)

Required. Audio encoding of the synthesized audio content.
sampleRateHertz

integer

Optional. The synthesis sample rate (in hertz) for this audio. If not provided, then the synthesizer will use the default sample rate based on the audio encoding. If this is different from the voice's natural sample rate, then the synthesizer will honor this request by converting to the desired sample rate (which might result in worse audio quality).
synthesizeSpeechConfig

object (SynthesizeSpeechConfig)

Optional. Configuration of how speech should be synthesized. If not specified, Agent.text_to_speech_settings is applied.

OutputAudioEncoding

Audio encoding of the output audio format in Text-To-Speech.

Enums
OUTPUT_AUDIO_ENCODING_UNSPECIFIED Not specified.
OUTPUT_AUDIO_ENCODING_LINEAR_16 Uncompressed 16-bit signed little-endian samples (Linear PCM). Audio content returned as LINEAR16 also contains a WAV header.
OUTPUT_AUDIO_ENCODING_MP3 MP3 audio at 32kbps.
OUTPUT_AUDIO_ENCODING_MP3_64_KBPS MP3 audio at 64kbps.
OUTPUT_AUDIO_ENCODING_OGG_OPUS Opus encoded audio wrapped in an ogg container. The result will be a file which can be played natively on Android, and in browsers (at least Chrome and Firefox). The quality of the encoding is considerably higher than MP3 while using approximately the same bitrate.
OUTPUT_AUDIO_ENCODING_MULAW 8-bit samples that compand 14-bit audio samples using G.711 PCMU/mu-law.